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These economical stainless steel mesh sieves can be stacked together to help separate soil or sediment particle sizes. Available either separately or as a set of six. The set contains a lid and a catch pan.

Sizes: 4000 micron, 2000 micron, 500 micron, 250 micron, 125 micron and 63 micron.

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This is great for soil and general particle sifting. 24 x 16 x 3” with 2mm aperture (2000 micron) to correspond to US Sieve Size 10. Wood frame, steel mesh, great quality and price.

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Quantify the results of your field study with our folding sampling square. This plastic device cleanly and quickly marks off either a quarter meter square (0.25 meter squared) or a full meter square (1.0 meter squared) on land or in water. It snaps open with a durable shock cord inside the PVC legs. Connections are made with T-connectors which allow the frame to sink in water. Collapsible for transport and storage. Comes with instructions.

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Measure great distances with our top quality trundle wheel. This distance counter features a 30cm rubberized wheel. The unit will fold down to be carried in its included soft bag. The five digit counter will light up with a flip of a switch on the handle to illuminate the numbers in low lighting.

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This sieve set lets students separate and grade soil and rock samples in order to determine the makeup of the soil strata. Each set stacks together and includes bottom pan and lid with Teacher's Guide. 6-3/4" x 3" with wire mesh bottom.

Set of four includes: #5, #10, #60, #230
Set of six includes: #5, #10, #35, #60, #120, #230

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Sift out sticks and leaves in your sample. Can be used on the top of our wash bucket (623-3210) or your 5-gallon container.

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This 12" stainless steel sampler takes a sample 7" long, and 1/2" in core diameter. Use the cut-away side to check your core sample before removing it for testing.

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This will take care of most sizing, testing and grading requirements in the all-important 500 micron range. Mesh counts and openings are accurate and will not trap particles. Die-case brass frame and stainless steel mesh. 2 x 8" diameter.

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Rugged thermometer features readings of -15° to 65°C with easy-to-read numbers. 12.5" (32 cm) long. Includes a push ball for insertion into soil.

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Features a 2" diameter dial, 6" stainless steel stem and temperature range of 30 to 90°F.

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Monitor temperature of compost accurately.
Features a 2" diameter dial, 24" stainless steel stem and temperature range of +10 to 90°C (+50 to 190°F).

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Specifically designed to meet the needs of the GLOBE program, this kit contains enough materials for 50 tests. Includes non-hazardous tablets, instructions and laminated color chart. Test for nitrogen, phosphorus and potassium.

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This popular pH soil kit highlights the need for accurate pH testing to determine lime requirements and to ensure soil fertility. Includes: chemical indicator, color comparator chart, plastic spot plate, instructions, and soil test handbook.
Enough materials for 100 pH tests. Test for nitrogen, phosphorus and potassium.

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Grades 4 - 6; 40 tests.
Soil testing can't get much easier than this. Mix soil with water, let it settle, add a tablet, and compare the liquid to the color film chart. Includes: instructions and materials for 10 tests each of pH, nitrogen, phosphorus and potash.

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For 50 students.
Conduct a thorough evaluation of soil with ordinary soil samples your students can dig up anywhere. We introduce simple, easy-to-follow techniques and staining procedures early on so your students can get the most out of these activities. Soon they're able to identify the type and variety of microorganisms, calculate soil fertility by a cation exchange capacity elimination, test and determine soil pH, and correlate the soil's pH to soil lime requirements.

Kit includes:
12 chem-plates; 12 calibrated tubes; 4 drop-controlled bottles Phenolic Rose Bengal; 3 drop-controlled bottles Barium Chloride solution; 2 drop-controlled bottles of pH Soil Indicator solution; 1 drop-controlled bottle of Potassium Dichromate solution; 50 plastic slides; 50 plastic cups; 50 worksheets and guides; instruction manual with MSDS

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This classroom favorite is an exciting introduction to the physical and chemical properties of soil. Each student completes seven units while performing individual tests with safe and easy-to-use tablets. Includes: curriculum materials, reagent tablets, and sample bags for 50 students.
Grades 4 - 8.

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Discover the importance of composting - even develop an eye for an earthworm - with this interesting introductory kit. You'll learn what healthy plants require in terms of soil texture, pH levels and nutrients while performing tests using non-hazardous TestTab reagent tablets. We provide instructions and materials to perform 10 tests each of pH, Nitrate, Phosphate and Potassium.

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Kit contains enough materials for 30 students working in pairs.
Test for the presence of 10 nutrients and minerals in ordinary soil samples and learn why they are essential for plant growth. Compare soil samples. This kit highlights water content, organic matter and pH, too.

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Kit contains enough materials for 30 students working in pairs.
Have your students culture their own soil microbes to get the real scoop on life beneath the earth's surface. Your group will collect and extract different soil samples, then record the number and types of organisms found.

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Using the Agricultural Combination Test Kit as its foundation, the Soil Quality Education Test Kit is designed to provide a complete unit for teachers and introduce students to important chemical tests for evaluating soil quality and fertility, and relate these measurements to the principles of plant metabolism. Tied together by an extensive Teacher's Guide, this kit includes in-depth background information about each parameter, has classroom activities designed to introduce students to each parameter, and contains detailed field-testing procedures.

Contains:

• Agricultural Combination Test Kit, with 50 test each, for testing nitrogen, phosphorus, (NPK) and pH. Waterproof pH/ temperature tester with floating casing
• Waterproof conductivity tester
• Digital thermometer
• Teachers manual
• Laboratory cards
• Overhead transparencies
• Lab activity worksheets